1. Cardiff China Medical Research Collaborative, Division of Cancer and Genetics, Cardiff University School of Medicine, Cardiff, CF14 4XN, UK
2. Barbara Ann Karmanos Cancer Institute, Departments of Oncology, Pharmacology and Pathology, School of Medicine, Wayne State University, Detroit, MI 48201, USA
3. Yantai Yuhuangding Hospital, Yantai, Shandong 264000, P.R. China